And it looks like at least some of those will continue. Shortly after President Donald Trump announced Pruitt's resignation, Rep. Elijah Cummings released a letter to the EPA inspector general and said the House committee's investigation was ongoing. And a Washington, D.C.-area reporter tweeted that the IG's investigation into improper travel by Pruitt will continue.

Even though he's no longer a federal employee, Pruitt could still face consequences for crimes he may have committed. For example, if any of the inspector general's investigations uncover criminal wrongdoing, that evidence will be turned over to the U.S. Attorney's Office for possible prosecution.